Ultra-Clear Tempered Glass from China Factory - High-Quality Suppliers, Custom Sizes & Thickness Available
Glass Specifications
Optical Performance
- Visible Light Transmittance (VLT) 91.5%–92.5% (6mm thickness)
- Solar Heat Gain Coefficient (SHGC) 0.87–0.90 (6mm clear glass)
- UV Transmittance ≈75% (without coating)
- Reflectance ≈8% (surface reflection)
Physical & Chemical Properties
- Density 2.5 g/cm³
- Thermal Expansion Coefficient 9.0×10⁻⁶/K (20–300°C)
- Softening Point 720°C
- Annealing Point 550°C
- Acid resistance (ISO 695) Class A
- Alkali resistance (ISO 695) Class A
Frequently Asked Questions
What is the Visible Light Transmittance (VLT) of this glass?
At a standard 6mm thickness, this glass offers an exceptionally high Visible Light Transmittance (VLT) of 91.5% to 92.5%, providing maximum clarity and brightness.
What are the thermal properties of this glass?
This glass has a density of 2.5 g/cm³, a thermal expansion coefficient of 9.0×10⁻⁶/K (measured between 20–300°C), a softening point of 720°C, and an annealing point of 550°C.
Does this glass offer chemical resistance?
Yes, it features excellent chemical durability, achieving Class A ratings for both Acid resistance and Alkali resistance under the ISO 695 international standard.
What is the UV transmittance rate without coating?
Without any additional coatings, the glass has a UV transmittance of approximately 75%, allowing natural light transmission while blocking a portion of ultraviolet rays.
What is the surface reflectance and solar heat gain coefficient?
The glass has a low surface reflectance of approximately 8%. The Solar Heat Gain Coefficient (SHGC) ranges from 0.87 to 0.90 for a standard 6mm clear glass configuration.